Result

This is the camera Angle design for this scene, but seems too noisy for this render. I will need to try another version with less grain. It is not easy to balance as lowering the voxels size would definitely dragged the computer performance slower.

At this moment, my renderer takes about 3-4 minutes to render one frame. I think it is acceptable as the total number are 250 frames.

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Regarding the volume fog, I expected the thickness would be just above to see the building lighting behind. As it is quite a distance from the main diner to the building behind. The lighting should be dimmed but remained visible for mystery.

I also used some modelling in Cinema4D default content browser, such as the street lamps. It is so convenient to add them in scene, as they are all fully modelled and textured for designers to use. As I am not very keen to work on UV texturing, it would be a great help for me to save some time. And I felt it is quite common for VFX artists to use preset modelings, as long as they have got their permission and add credits to those artists.